[Amps] close to off topic - how to read antenna R + jX ??

Dan Sawyer dansawyer at earthlink.net
Sat Feb 26 16:16:59 EST 2005


All,

I have become interested in leaning more about what is actually going on 
at the antenna. I have a vertical and would like to measure it.

First I have an Autek RF-1. It measures swr, Z, L, and C at a preset f. 
I am not certain what the L and C are reading. When I measure a 50 Ohm 
terminator at 7.2 MHz it actually reads a Z of 50 and an SWR of 1.0. 
However the L and C readings are of 2 uH and 2500 pf.  What are these 
actually measuring? The values are very close to those from the antenna. 

How can I actually measure the L and or C component of the antenna? If I 
use an impedance bridge at the frequency will it measure L (or C)?

I hope this is close enough to topic.

Dan



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